Warm-blooded fish: Dr Beach to discuss and dissect (metaphorically!). Dr Surf's annual winter wetsuit review. Back zip, chest zip, no zip? 3/2, 4/3, 5/4? Rip Curl, O'Neill, Patagonia, Excel? What the hell does all this mean? And Radio Marinara Dive Reporter Terri Allen talks about diving with US sharks, and what the wreck diving scene is like in North Carolina.